阅读理

若p、q、m为整数，且三次方程x³+px²+qx+m=0有整数解c，则将c代入方程得：c³+pc²+qc+m=0，移项得：m=-c³-pc²-qc，即有：m=c×（-c²-pc-q），由于-c²-pc-q与c及m都是整数，所以c是m的因数．上述过程说明：整数系数方程x³+px²+qx+m=0的整数解只可能是m的因数．例如：方程x³+4x²+3x-2=0中-2的因数为±1和±2，将它们分别代入方程x³+4x²+3x-2=0进行验证得：x=-2是该方程的整数解，-1，1，2不是方程的整数解．

解决问题：

（1）根据上面的学习，请你确定方程x³+x²+5x+7=0的整数解只可能是哪几个整数？

（2）方程x³-2x²-4x+3=0是否有整数解？若有，请求出其整数解；若没有，请说明理由．

阅读理解。

     It's hard to make friends if you stay home alone all the time. Get out of the house and do things that will put you in touch with other People. It's easier to make friends when you have similar interests.

     Don't be afraid to show people what you're really good at. Talk about the things you like and do best. People will be interested in you if there is something interesting about you.

     Look at people in the eye when you talk to them. That way, they'll find it easier to talk to you. or

people, may think you're not interested in them and may stop being interested in you.

     Be a good listener. Let people talk about themselves before talking about 66 me, me, me .Ask lots of

questions. Show an interest in their answers.

     Try to make friends with the kind of people you really like, respect, and admire (羡慕) not

just with those who are easy to meet. Be friendly with a lot of people. That way, you'll have a bigger group to choose from and have more chances for making friends.

1. How can we have more friends, get in touch with other people or stay at home?

2. When Jim talks to people, he always looks right, left, or at the floor. Do you think it's right? Why or

    why not?

3. Cindy always talks about herself when she talks to other people. What advice do you think   she needs

    to follow?

4. What should you do if you want to have more chances for making friends?

5. What's the main idea of the passage?